摘要
设计了一种面向皮卫星应用的MEMS陀螺温度控制系统,其控制原理为基于ADN8831的TEC温度控制。分析了影响温控系统控制精度的各因素,并且通过Steinhart-Hart方程对热敏电阻的R-T特性进行拟合校准后表明,本温控系统的精度达到±0.03℃。将设计的温控系统应用于面向皮卫星的MEMS陀螺温度控制,通过Allan方差分析MEMS陀螺的误差项。通过不同温度下实验得出,当该温控系统存在时,零偏不稳定性和速率随机游走得到了不同程度的改善,验证了温控系统的有效性,满足了皮卫星体积小、功耗低的要求。
A temperature control system of MEMS gyroscope which faces to Pico-Satellite application is designed,the principle is based on ADN8831 and TEC.The factors which influence the accuracy of the temperature control system is analyzed,and the R-T characteristics of thermistor which shows that the precision of the temperature control system is about ±0.03 ℃ are fitted by Steinhart-Hart equation.The temperature control system is used for MEMS gyroscope which faces to Pico-Satellite application and the Allan variance theory is used to stochastic modeling of MEMS gyroscope,the results of temperature experiments show that Bias instability and Rate Random Walk of MEMS gyroscope are enhanced,which validates the effectiveness of the temperature control system,according to the characteristics of small volume low power of Pico-Satellite.
出处
《传感技术学报》
CAS
CSCD
北大核心
2011年第6期818-823,共6页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金项目(60904090)
